D-type fiber biosensor based on surface-plasmon resonance technology and heterodyne interferometry

被引:108
作者
Chiu, MH
Wang, SF
Chang, RS
机构
[1] Natl Huwei Univ Sci & Technol, Dept Electroopt Engn, Huwei Yulin 632, Taiwan
[2] Natl Cent Univ, Inst Opt Sci, Taoyuan 320, Taiwan
关键词
D O I
10.1364/OL.30.000233
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
A D-type fiber biosensor based on surface-plasmon resonance (SPR) technology and heterodyne interferometry is presented. The sensing device is a single-mode optical fiber in which half the core is polished away and a thin-film layer of gold is deposited. We measure the phase-difference variations instead of the light intensity as in traditional SPR techniques. Therefore the accuracy and resolution of our method are very high. Its sensitivity, can reach 2 X 10(-6) refractive-index units. The sensor has some merits, e.g., tunable high sensitivity, small size, lower cost, smaller sample volume, and suitability for in vivo testing. This novel method of a D-type fiber biosensor based on SPR technology and heterodyne interferometry is valuable for chemical, biological. and biochemical sensing, and the novel method of D-type fiber biosensing is a feasible means of study. (C) 2005 Optical Society of America.
引用
收藏
页码:233 / 235
页数:3
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